🔍 Key Concepts

• Babbitt bearings and how soft metal linings are attached to a harder shell • Difference between mechanical locking (interlocking surfaces/pins) and bonding by pressure or oil film • Manufacturing methods: casting, spinning, pressure head vs. securing/anchoring methods

💭 Think About

• Think about whether an oil wedge can actually hold metal in place, or only support the shaft during operation. • Which option describes a positive, physical way to prevent the Babbitt from working loose from the shell? • Consider which choice sounds more like a manufacturing/production step and which sounds like a specific retention/locking feature.

✅ Before You Answer

• Verify which options describe a mechanical lock between Babbitt and shell (grooves, pins, pockets). • Check if any choice incorrectly relies on lubricating oil pressure as a structural fastening method. • Identify which answers talk about how the Babbitt is poured or formed versus how it is locked to the shell once in place.